well, not quite ANY market.... domestic only and realistically it'll have to be in the lower 48... and there are limitations on what WN can push thru DAL but few people are willing to admit ther drain that DAL could have on AA's domestic revenues at DFW.
DAL is a far closer airport and the airport location of DAL is totally different from any other secondary to primary airport in cities that have two airports in the US. HOU and MDW are on opposite sides of downtown from IAH and ORD, for example.
And even at DFW, other carriers not allied w/ AA continue to grow their presence.
2014 is also when many of the countries in Latin America that do not currently have Open Skies have committed to have them w/ the US... and that includes providing additional US carrier access between MIA and Latin America. AA has done as well as it has in Latin America because other US carriers cannot add capacity into many of the key airports in Latin America, esp. from MIA.
AA will face a much tougher competitive environment within less than 2 years.....